@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Space+Mono:wght@400;700&display=swap');

:root {
    --primary-gradient: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #f59e0b;
    --danger: #ef4444;
    --border: rgba(255, 255, 255, 0.1);
    --shadow-premium: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.15);
    --input-bg: rgba(15, 23, 42, 0.6);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 2rem;
    overflow-x: hidden;
}

/* ── Background Blobs ── */
.bg-blobs {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
}

.blob {
    position: absolute;
    width: 600px;
    height: 600px;
    background: var(--primary-gradient);
    filter: blur(140px);
    opacity: 0.1;
    border-radius: 50%;
    top: -100px;
    right: -100px;
}

.blob-2 {
    bottom: -100px;
    left: -100px;
    background: linear-gradient(135deg, #10b981 0%, #3b82f6 100%);
}

/* ── Main Layout ── */
.tool-container {
    max-width: 1000px;
    margin: 0 auto;
    background: var(--card-bg);
    backdrop-filter: blur(24px);
    border: 1px solid var(--border);
    border-radius: 32px;
    padding: 2.5rem;
    box-shadow: var(--shadow-premium);
}

.header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 0.5rem;
}

.header p {
    color: var(--text-secondary);
}

/* ── Editor Section ── */
.section-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.input-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.mode-selector {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    padding: 4px;
    border-radius: 12px;
}

.mode-btn {
    padding: 0.6rem 1.25rem;
    border: none;
    background: none;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.2s;
}

.mode-btn.active {
    background: var(--accent);
    color: #fff;
}

.visual-indicator {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    transition: background 0.05s;
}

.visual-indicator.active {
    background: var(--accent);
    box-shadow: 0 0 20px var(--accent);
}

.editor-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.editor-box {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

label {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

textarea {
    width: 100%;
    height: 200px;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    color: #fff;
    padding: 1.25rem;
    font-family: 'Space Mono', monospace;
    font-size: 1rem;
    line-height: 1.6;
    resize: none;
    outline: none;
    transition: all 0.3s;
}

textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.1);
}

.output-wrapper {
    position: relative;
    height: 100%;
}

.copy-btn {
    position: absolute;
    right: 0.75rem;
    bottom: 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.copy-btn:hover {
    background: var(--accent);
    color: #fff;
}

/* ── Controls Card ── */
.controls-card {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.audio-controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.control-item {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

input[type="range"] {
    accent-color: var(--accent);
    cursor: pointer;
}

.action-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn {
    padding: 1rem 2.5rem;
    border-radius: 14px;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.btn-primary {
    background: var(--primary-gradient);
    color: #fff;
    border: none;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(245, 158, 11, 0.3);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover:not(:disabled) {
    background: var(--danger);
    color: #fff;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.info-section {
    padding: 1rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ── Responsive ── */
@media (max-width: 768px) {
    .editor-grid {
        grid-template-columns: 1fr;
    }

    .audio-controls {
        grid-template-columns: 1fr;
    }

    .action-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}